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Finding the Fourth Proportional to 417.84, 626.91 and 129.27

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Solution

The fourth proportional to 417.84, 626.91 and 129.27 is: 193.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.84 : 626.91 = 129.27 : x
  2. Step 2: Convert to fraction form
    417.84/626.91 = 129.27/x
  3. Step 3: Cross multiply
    417.84x = 626.91 × 129.27
  4. Step 4: Simplify right side
    417.84x = 81,040.66
  5. Step 5: Solve for x
    x = 81,040.66/417.84
  6. Step 6: Final answer
    x = 193.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.